Offset Drive Wheel Gear Ratio for Steering and Output Balance
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Solution Overview
Problem
The existing drive wheel design, where the wheel is offset with respect to the pivot shaft, faces challenges in achieving maximum rotational frequency output and efficient driving due to increased turning radius and difficulty in manual steering, leading to reduced efficiency.
Innovation Solution
The drive wheel is designed with a first and second input shaft coaxially disposed, with a first and second output shaft on different axes, and power conversion mechanisms that transmit rotational force to the wheel, where the rotational frequency of the wheel is set equal to the pivot shaft's frequency, and the gear ratios are adjusted to optimize the wheel's rotational speed and steering speed, allowing for efficient rotation and steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the wheel is offset with respect to the pivot shaft, then the minimum ground clearance is ensured, but the drive wheel cannot obtain maximum rotational frequency output reducing efficiency
Solution Approach 1:
The patent optimizes the gear ratio parameter in the power conversion mechanism to compensate for the offset configuration. By adjusting the gear ratio, the system achieves substantially equal rotational speeds between the wheel and pivot shaft, maximizing the rotational frequency output and driving efficiency while maintaining the beneficial ground clearance provided by the offset design.
2Ease of operation
If the rotational speed of the wheel is suppressed to control course change, then the ease of operation is improved, but the maximum rotational frequency output from the driving source is not obtained reducing efficiency
Solution Approach 1:
The patent sets the gear ratio parameter such that the wheel rotational speed substantially equals the turning speed (V1=V2). This parameter optimization simultaneously achieves easy course change control and maximum utilization of the driving source output, eliminating the need for speed suppression and improving driving efficiency while maintaining operational ease.
Data Source
AI summary
A drive wheel in which the rotational axial center of a wheel along the vertical direction intersecting the axial center of the axle is arranged shifted in the horizontal direction orthogonal to the axial center of the axle with respect to the axial center of the pivot shaft. When a radius R1 of the wheel, center distance R2 between the rotational axial center and the axial center of the pivot shaft, rotational frequency n1 of the wheel, rotational frequency n2 of the pivot shaft, rotational speed V1 of the wheel, and steering rotational speed V2 of the wheel rolling on a floor surface while turning the pivot shaft satisfy V1=V2, relations of V1=2π×R1×n1, V2=2π×R2×n2, and n1=n2 (R2/R1) are satisfied.